659843 has 2 divisors, whose sum is σ = 659844. Its totient is φ = 659842.

The previous prime is 659831. The next prime is 659849. The reversal of 659843 is 348956.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-659843 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (659849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329921 + 329922.

It is an arithmetic number, because the mean of its divisors is an integer number (329922).

2⁶⁵⁹⁸⁴³ is an apocalyptic number.

659843 is a deficient number, since it is larger than the sum of its proper divisors (1).

659843 is an equidigital number, since it uses as much as digits as its factorization.

659843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 659843 is about 812.3072078961. The cubic root of 659843 is about 87.0589726558.

The spelling of 659843 in words is "six hundred fifty-nine thousand, eight hundred forty-three".